On Tue, Oct 10, 2006 at 11:00:42PM -0700, Andrew Morton wrote:> On Wed, 11 Oct 2006 15:39:22 +1000> Nick Piggin <nickpiggin@yahoo.com.au> wrote:> > > But I see that it does read twice. Do you want that behaviour retained? It> > seems like at this level it would be logical to read it once and let lower> > layers take care of any retries?> > argh. Linus has good-sounding reasons for retrying the pagefault-path's> read a single time, but I forget what they are. Something to do with> networked filesystems? (adds cc)

While you're there, can anyone tell me why we want an externalptracer to be able to access pages that are outside i_size? Ihaven't removed the logic of course, but I'm curious about thehistory and usage of such a thing.